package com.michael.redis;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;

@EnableCaching
@Configuration
public class RedisConfigurer extends CachingConfigurerSupport {

	@Bean
    public KeyGenerator keyGenerator() {
        return new KeyGenerator() {
            @Override
            public Object generate(Object target, Method method, Object... params) {
                StringBuilder sb = new StringBuilder();
                sb.append(target.getClass().getName());
                sb.append(method.getName());
                for (Object obj : params) {
                    sb.append(obj.toString());
                }
                return sb.toString();
            }
        };
    }

	@SuppressWarnings("rawtypes")
    @Bean
    public CacheManager cacheManager(RedisTemplate redisTemplate) {
        RedisCacheManager rcm = new RedisCacheManager(redisTemplate);
        //设置缓存过期时间
        Map<String, Long> expires = new HashMap<>();
        rcm.setExpires(expires);	// 指定某一个 key 的过期时间
        rcm.setDefaultExpiration(10);//过期时间  10 秒
        return rcm;
    }


	/**
	 * 根据需要配置不同类型的 template
	 * @Bean
	 * public RedisTemplate<String, Integer> redisTemplate1(RedisConnectionFactory redisConnectionFactory)
	 * 		throws UnknownHostException {
	 *
	 * 	RedisTemplate<String, Integer> template = new RedisTemplate<String, Integer>();
	 * 	template.setConnectionFactory(redisConnectionFactory);
	 * 	template.setKeySerializer(template.getStringSerializer());
	 * 	template.setValueSerializer(new Jackson2JsonRedisSerializer<Integer>(Integer.class));
	 *
	 * 	return template;
	 * }
	 *
	 * @Bean
	 * public RedisTemplate<String, ChatMsg> redisTemplate2(RedisConnectionFactory redisConnectionFactory)
	 *         throws UnknownHostException {
	 *
	 *     RedisTemplate<String, ChatMsg> template = new RedisTemplate<String, ChatMsg>();
	 *     template.setConnectionFactory(redisConnectionFactory);
	 *     template.setKeySerializer(template.getStringSerializer());
	 *     template.setValueSerializer(new Jackson2JsonRedisSerializer<ChatMsg>(ChatMsg.class));
	 *
	 *     return template;
	 * }
	 *
	 * @param factory
	 * @return
	 */
    @SuppressWarnings({ "rawtypes", "unchecked" })
	@Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory factory) {
        StringRedisTemplate template = new StringRedisTemplate(factory);
        // 配置序列化规则
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }


}
